Saline water refining system

Abstract

The utility model provides a brine refining system, which relates to the technical field of brine refining and comprises a water distribution tank, a brine dissolving pump, a reaction tank, a membrane filtration feeding pump, a brine coarse filter, a filtration circulating tank, a membrane filtration circulating pump, an inorganic membrane filter and a primary brine storage tank, the water distribution tank, the salt dissolving water pump, the reaction tank, the membrane filtration feeding pump, the salt water coarse filter, the filtration circulating tank, the membrane filtration circulating pump, the inorganic membrane salt water filter and the primary salt water storage tank are sequentially connected, and the filtration circulating pump is further connected with the inorganic membrane salt water filter; the salty mud tank is connected with the saline water coarse filter, the filtering circulating tank and the inorganic membrane filter; a plate-and-frame filter press, a salty mud pump and a water diversion tank are sequentially arranged between the salty mud pool and the filtrate pool; the main conveying pipe is connected with the water distribution tank; one end of the auxiliary conveying pipe is connected with the main conveying pipe, and the other end of the auxiliary conveying pipe is connected with a baffling groove which is communicated with the salty mud tank. The working efficiency of the system can be improved, and the service life of the system can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of brine refining, in particular to a brine refining system. Background Art

[0002] At present, the sulfate content of raw salt used in the brine refining process exceeds the standard value. The existing process adds the refining agent barium chloride in the baffle tank. Due to the short reaction time and insufficient reaction, it cannot achieve the purpose of removing sulfate; instead, the barium sulfate precipitation formed will affect the filtration flux of the inorganic membrane brine filter; adding excessive barium chloride solution to the brine system will cause a large amount of salt crystallization, resulting in clogging of the pipe or pump impeller, and excessive Ba 2+ It enters the electrolytic cell, reduces the anode current efficiency and chlorine purity, and forms tri-salts with other substances, which affects the service life of the ion membrane.

[0003] Therefore, there is an urgent need for a brine refining system to solve the problem that the sulfate index of the current system is difficult to control and a large amount of salt crystals are easily generated, resulting in blockage of pipelines or pump impellers. Utility Model Content

[0004] The utility model provides a brine refining system, which solves the problems in the existing system that sulfate index is difficult to control and a large amount of salt crystals are easily generated, resulting in blockage of pipelines or pump impellers.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A brine refining system comprises a water distribution tank, a chemical brine pump, a reaction tank, a membrane filtration feed pump, a brine coarse filter, a filtration circulation tank, a membrane filtration circulation pump, an inorganic membrane filter and a primary brine storage tank; the water distribution tank, the chemical brine pump, the reaction tank, the membrane filtration feed pump, the brine coarse filter, the filtration circulation tank, the membrane filtration circulation pump, the inorganic membrane brine filter and the primary brine storage tank are connected in sequence, and the filtration circulation pump is also connected to the inorganic membrane brine filter.

[0007] It also includes a salt mud pool and a filtrate pool, wherein the salt mud pool is connected to the brine coarse filter, the filtration circulation tank and the inorganic membrane filter;

[0008] A plate and frame filter press, a salt mud pump and a water diversion tank are sequentially arranged between the salt mud pool and the filtrate pool;

[0009] A filtrate pump and a water diversion tank are sequentially arranged between the water distribution tank and the filtrate tank;

[0010] It includes a main delivery pipe and an auxiliary delivery pipe, the main delivery pipe is connected to the water distribution tank; one end of the auxiliary delivery pipe is connected to the main delivery pipe, and the other end is connected to a baffle tank, and the baffle tank is connected to the salt mud pool.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0012] In actual use, part of the dechlorinated brine produced in the previous processing step will be added to the baffle tank through the auxiliary delivery pipe, and the reaction will produce Ba-containing 2+ The precipitate will be filtered out by the plate and frame filter press, and then the Ba 2+ The liquid is sent to the water distribution tank, so that the water in the water distribution tank contains Ba in the subsequent route. 2+ The precipitation is relatively small and the sulfate index in the brine is controlled, thereby preventing the pipeline or the pump impeller from being blocked. The utility model can improve the working efficiency and service life of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model before improvement;

[0014] Figure 2 This is a schematic diagram of the improved structure of the utility model.

[0015] Parts name and marking:

[0016] 1-water distribution tank; 2-brine pump; 3-reaction tank; 4-membrane filtration feed pump; 5-brine coarse filter; 6-filtration circulation tank; 7-membrane filtration circulation pump; 8-inorganic membrane brine filter; 9-filtrate tank; 10-salt mud tank, 11-plate and frame filter press, 12-salt mud pump, 13-water diversion tank, 14-filtrate pump, 15-baffle tank, 16-primary brine storage tank, 17-main delivery pipe, 18-auxiliary delivery pipe. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings.

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] This embodiment provides a brine refining system, such as Figure 1-Figure 2 As shown, it includes a water distribution tank 1, a chemical brine pump 2, a reaction tank 3, a membrane filtration feed pump 4, a brine coarse filter 5, a filtration circulation tank 6, a membrane filtration circulation pump 7, an inorganic membrane brine filter 8 and a primary brine storage tank 16; the water distribution tank 1, the chemical brine pump 2, the reaction tank 3, the membrane filtration feed pump 4, the brine coarse filter 5, the filtration circulation tank 6, the membrane filtration circulation pump 7, the inorganic membrane brine filter 8 and the primary brine storage tank 16 are connected in sequence, and the filtration circulation pump 6 is also connected to the inorganic membrane brine filter 8.

[0020] It also includes a salt mud pool 10 and a filtrate pool 9, the salt mud pool 10 is connected to the brine coarse filter 5, the filtration circulation tank 6 and the inorganic membrane filter 8;

[0021] A plate and frame filter press 11, a salt mud pump 12 and a water diversion tank 13 are sequentially arranged between the salt mud pool 10 and the filtrate pool 9; the salt mud pump 12 is used to send the salt mud in the salt mud pool 10 into the plate and frame filter press 11 for filtration to obtain filtrate.

[0022] A filtrate pump 14 and a water diversion tank 13 are sequentially arranged between the water distribution tank 1 and the filtrate pool 9. The filtrate pump 14 is used to send the filtrate in the filtrate pool 9 into the water distribution tank 1.

[0023] It includes a main delivery pipe 17 and an auxiliary delivery pipe 18. The main delivery pipe 17 is connected to the water distribution tank 1; one end of the auxiliary delivery pipe 18 is connected to the main delivery pipe 17, and the other end is connected to the baffle trough 15. The baffle trough 15 is connected to the salt mud pool 10.

[0024] In actual use, part of the dechlorinated brine produced in the previous processing step will be added to the baffle tank 15 through the auxiliary delivery pipe 18, and then react to produce Ba-containing 2+ The precipitate will be filtered out by the plate and frame filter press 11, and then the Ba 2+ The liquid is sent to the water distribution tank 1, so that the water in the water distribution tank 1 contains Ba in the subsequent route. 2 + The precipitation is relatively small and the sulfate index in the brine is controlled, thereby preventing the pipeline or the pump impeller from being blocked. The utility model can ensure smooth operation, thereby improving the working efficiency and service life of the system.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A brine refining system, comprising a water distribution tank, a chemical brine pump, a reaction tank, a membrane filtration feed pump, a brine coarse filter, a filtration circulation tank, a membrane filtration circulation pump, an inorganic membrane filter, and a primary brine storage tank; wherein the water distribution tank, the chemical brine pump, the reaction tank, the membrane filtration feed pump, the brine coarse filter, the filtration circulation tank, the membrane filtration circulation pump, the inorganic membrane brine filter, and the primary brine storage tank are connected in sequence, and the filtration circulation pump is also connected to the inorganic membrane brine filter; The invention also includes a salt mud pool and a filtrate pool, wherein the salt mud pool is connected to the brine coarse filter, the filtration circulation tank and the inorganic membrane filter; a plate and frame filter press, a salt mud pump and a water diversion tank are sequentially arranged between the salt mud pool and the filtrate pool; a filtrate pump and a water diversion tank are sequentially arranged between the water distribution tank and the filtrate pool; It is characterized by: It includes a main delivery pipe and an auxiliary delivery pipe, the main delivery pipe is connected to the water distribution tank; one end of the auxiliary delivery pipe is connected to the main delivery pipe, and the other end is connected to a baffle tank, and the baffle tank is connected to the salt mud pool.

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